Electricity generation accounts for around 30% of UK carbon dioxide (CO2) emissions. In the next decade, many coal and nuclear plants will close, leaving the UK increasingly dependent on imported gas. Government sets out two priorities in its Energy Review : security of energy supply and emissions reductions. This POSTnote discusses challenges facing electricity networks in the light of these priorities, such as connecting renewable generators in remote areas, and incorporating small-scale generation. It discusses barriers to progress, and policy options such as planning reform and incentives.